Chapter 842: Great Power

"Uh, Mr. Shen, didn't you just say..."
"What I said is that it will be more difficult to make these equipments now, but this is not to say that we need to restore our original capabilities. Mr. Tan, the times are constantly progressing. If we are determined to make these now With equipment, it only takes a little more time, and the things that are made will definitely be more advanced than before!"
Shen Hong said categorically, and at the same time, he took another look at Tan Zhenhua and said, "Mr. Tan, you don’t have to bend around here with my old man. You came here today, definitely not wanting to ask if you can make these things, you There must be some thoughts, right? Just say it!"
Okay, Tan Zhenhua also felt that there was no need to conceal anything from this respected old man, so he thought about it slightly and said, "Old Shen, since you ask that, then the kid will tell the truth. Your old man should also know "Luck Ten". Something?"
Shen Hong nodded slightly, of course he knew about such a big thing, not only did he know it, it had something to do with him, but he didn't think it needed to be broken for now.
Just listen to Tan Zhenhua continuing: "I talked to Chief Ma Fengshan about the "Yun 10" issue. He said that his biggest headache at the beginning was actually the overall load-bearing frame of the aircraft because there was not a large enough press. Therefore, the load-bearing structure of suitable size cannot be manufactured, and in the end, it can only be done by welding small forgings. On the one hand, the mechanical properties of the load-bearing structure are much worse, and on the other hand, it is difficult to control the weight. Ten "The main problem."
Shen Hong nodded slightly as he listened, Tan Zhenhua continued: "Shen, I don’t hide it from you. I actually know that the "Yun Ten" project is about to stop, but I think that the "Yun Ten" can be stopped. Our Huaxia The large aircraft project cannot be stopped, so I secretly slapped Master Ma and others, and started a project to introduce "BAC" from Britain. Now the production line is in place. Two sets are sent from Britain." The "One-Elevens" package has also arrived. Seeing that the assembly work of the first aircraft is about to begin, my first goal is about to be completed, but my next plan will inevitably meet Mr. He Ma The teacher had the same problem."
A smile appeared on the corner of Shen Hong's mouth. He said, "Mr. Tan, although I am a member of the first machine department, I know all these things you do. I know things that everyone who has retreated to the second line knows. , Do you think anyone on the top doesn’t know? We’re all guessing, what will you toss about next, someone said that you’re definitely planning to localize that aircraft next. It seems that they’re right Up."
Tan Zhenhua touched the back of his head embarrassedly and said: "Shen, let you see the joke, kid, I'm very careful, and I really planned to do so, but in this way, I will face the same problem as Chief Ma. Although my BAC passenger plane is much smaller than the "Yunshi", it is also an aircraft with a length of 30 meters. Its main bearing structure is not too small. Our existing equipment, such as Jiangnan Can the hydraulic press in the shipyard be processed?"
Shen Hong laughed loudly, patted Tan Zhenhua on the shoulder and said, "Mr. Tan, before answering your question, I have to correct one of your mistakes. To process the bearing structure of the passenger plane, you cannot use the one from the Jiangnan factory. That hydraulic press, that is free forging, is mainly for processing ship components, such as the ship’s drive shaft. It can’t do what you want. What you need is die forging.

Well, whether the pipe is die forging or free forging, these two terms belong to the series of knowing every word for Tan Zhenhua...
Seeing his dumbfounded look, Shen Hong couldn't help but feel a little bit of laughter. He thought for a while, got up, walked to the wall full of photos, took off a pair, and walked back to Tan Zhenhua. He said in front of him: "What you need is this. This is die forging, and it is also the only die forging hydraulic press of China Huaxia with a capacity of over 10,000 tons."
Tan Zhenhua looked at it and saw that this was the second photo that was hung on the wall just now. The small print on it read: In 1966, the 30,000-ton die forging hydraulic press of the 112 factory was completed.
Shen Hong’s voice followed:
The 112 factory, which belongs to the Ministry of Metallurgy, is also called the Southwest Aluminum Processing Plant. It was established in 1965 and located in Chongqin City. It is the largest aluminum product processing plant in our country and China’s aerospace industry. The aluminum support base, as you know, the load-bearing structure of the "Yun-10" aircraft is processed by their factory. In fact, it is also the only company in our country that can process the load-bearing structure of medium and large aircraft. The load-bearing structure of the "Yun Ten" is processed on this equipment."
It turns out that there is still this origin.
Tan Zhenhua took a close look at the equipment in the photo and found that it was indeed different from the one in the Jiangnan Shipyard. He curiously asked: "This one is 30,000 tons, which is bigger than the one in the Jiangnan Shipyard. That's too much, Mr. Shen, then my problem, can this device solve it?"
Shen Hong rarely showed an old naughty expression, winking at Tan Zhenhua, "Guess?"
"Uh……"
"Okay, stop joking with you, let me literate you."
Shen Hong finally receded his look, and the expression on his face slowly became formal: "Mr. Tan, I must first establish a concept for you: die forging and free forging of more than 10,000 tons are the real national weapons! How important is it? It can be said that without this equipment, it is impossible to develop an autonomous and controllable manufacturing industry. However, this topic is too broad. Since you are here to build airplanes today, we will give priority to this die forging. ."
"Die forging hydraulic press is mainly used for die forging of aluminum, aluminum alloy and magnesium alloy forgings for aircraft and spacecraft; stainless steel, special alloy steel, titanium alloy and other high-temperature and high-strength alloy forgings. Die forging hydraulic press has more advantages than free forging hydraulic press Greater working force, larger workbench area and higher structural rigidity.
In the early 1940s, Hans people first produced a giant 15,000-ton die forging hydraulic press, while the largest die forging press in the United States at that time was only 5,000 tons, which led to a long-term shortage of large aviation die forgings. The U.S. had to make hundreds of small die forging presses for combat readiness, and then changed the die forgings that should have been made by large presses into forgings made by small presses for welding and assembly—just like the one used by Chief Ma This method, but this will significantly increase the weight of aviation forgings.
After World War II, the United States and Soviet Russia divided up Hans's press equipment and mechanical engineers, and based on this, they manufactured a large number of large presses for themselves. Among them, the United States took away two 15,000-ton die forging presses from Hans, and with the help of looted talents, it manufactured one 10,000-ton, one 12,600-ton, one 18,000-ton, two 31,500-ton, and two 45,000-ton large-scale forging presses. The die forging press, with these equipment, solved the problem of large aerospace structural forgings, and it was able to manufacture super-large aircraft such as B52, C5 "Galaxy", Boeing 747, and the two 45,000 successfully built in 1955 The large-ton die forging press has been working to this day, and it is not an exaggeration to say that it is a strategic national treasure of the United States.
Of course, Soviet Russia also used this plunder to lay an important cornerstone of its aviation industry. Its current largest die forging hydraulic press has 2 sets of 75,000 tons. Therefore, it can manufacture such an 124 with a take-off weight of 400 tons. Super large aircraft.
In fact, it is the same in Europe. If Gaul hadn't bought a 65,000-ton die-forging hydraulic press from Soviet Russia in 1976, it would not be able to build a large aircraft like the Airbus A300. "
Having said this, Shen Hong thought for a while and added: "Although the giant die forging hydraulic press is so important, its design and manufacturing difficulty and manufacturing cost are very high. It is not possible to manufacture it without a country with a complete industrial system and research and development capabilities. So, as of today, there are only 18 giant hydraulic presses with more than 20,000 tons in service in the world."
After listening to these, Tan Zhenhua had a general idea, and he couldn't help but sigh in his heart. Shen Hong was right. Such equipment is the real power of the great power!
However, then he also had questions: "Shen Lao, according to what you just said, the largest die forging hydraulic press in the United States is only 45,000 tons, but they can make large and super large aircraft with excellent performance. Why?"